Handsaw.



J. WOOD.

HANDSAW.

APPLICATION FILED MAR.4, 1914.

1,113,591, Patented 0ct.13,1914.

THE NORRIS PETERS C0,. PHOTOLITHO" WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

JOSEPH woon, or EVERETT, ivrnssacnosn'rrs.

I-IANDSAW.

AppIication fiieaivrareaa'. 1914. sa is No. 822,341. ,7

To (ZZZ whom it may concern.

Be it known that I, J osnrrr 001), a citizen of the United States, and aresident of Everett, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inHandsaws, of which the following is a specification.

This invention relates especially to a hand saw for the use of butchers,the saw comprising a frame, a saw blade and mechanism for straining theblade to fit it for use and for loosening the blade to permit itsremoval.

The invention has for its object to provide an improved constructionenabling the blade to be quickly tightened and loosened and providing asaw which is suitably strong, simple and durable.

The invention consists in the improvements which I will now proceed todescribe and claim.

Of the accompanying drawings forming a part of this specification:Figure 1 represents a side view of a saw embodying my invention, theblade being strained; Fig. 2 represents a side view of a portion of thesaw, the blade being loosened and a part of the handle being brokenaway; Fig. 3 represents a section on line 33 of Fig. 1; Fig. 4represents a section on line l4e of Fig. 1; Fig. 5 represents a sectionon line 55 of Fig. 1. i

The same reference characters indicate the same or similar parts in allof the views.

My improved saw comprises a rigid frame composed of a back 12, an outerarm 13 adapted to detachably engage the outer end of a saw blade 14, andan inner arm 15 carrying a strainer lever hereinafter described, saidbacking arm being preferably,

made from a single bar of steel formed as shown by Fig. 1.

To the outer end of the arm 15 is connected by a pivot pin 16 an ear 17formed on a lever 18, the arm 15 being slotted as shown by Fig. 5toreceive the ear 17. The lever 18 has a downwardly projecting shorterarm with which the inner end of the blade 1-1 is engaged at19, and anupwardly projecting longer arm.

20 represents a handle adapted to be grasped by the operator and havinga slot inits forward portion, the sides of said slot constituting twoears 21 which bear on 0pposite sides of the frame. The body of thehandle'ispreferably made of wood and the slot is preferably providedwith a metallic lining composed of side members 22 and a back member 23formed as shown by Fig. 2.

The lining members are attached to each other and to the wooden body ofthe handle by transverse screws or rivets 24. The

upper forward portions of the cars 21 are hinged to the frameby means ofa pivot pin or stud 25, which holds the inner sides of theears or thelining members 22 thereof in close sliding contact with the sides of theframe, as shown by Fig. 4-; The inner end of the 'slot orthe liningmember 28 therein has an elongated outer surface constituting anabutment which is in sliding contact with the longer arm of thestraining lever 18. Said longer arm is arranged to enter the slot andbear on the said abutment.

hen the handle is swung from its operative position, as indicated byFig. 2, the lever 18 is held by the blade in a position inclinedrelatively to the abutment, the

blade being therefore loose and adapted to be removed from the frame.When the handle is swung to its operative position relatively to theframe, as shown by Fig. 1, the abutment slides in contact with the lever18 and forces saidlever to the position shown by Fig. 1, its shorter armbeing thus moved away from the outer frame arm 13 and caused to strainthe blade, the lower portions of the ears 21 of the handle being at thesame time caused to bear on opposite sides of'the inner framearm 15. Itwill now be seen that when the handle is in its operative position thelever 18 is .held

thereby in its straining position, the longer arm of said lever and theinner frame arm '15 being at the same time located in the handle slot sothat the frame arm 15 supports the handle against lateral twistingmovementsand prevents strain on the pivot 25, the longer arm of thestraining lever 18 being at thesa-me time covered and securely protectedagainst sidewise displacement.

Specification of Letters Patent. t ht t 3, 1914,

' Means are provided forisecuring the handle in its operative relationto the frame, said means preferably including a detent 28 which may beformed. on the linlng member 23 andislocated adjacent to thepivot 16 ofthe straining lever, and a U-shaped latch 29, which is secured by and adted to swing, on the pivot 16, the neck po -h the latch being adapted tofrictionally engage the rear side of the detent 28, as shown ion of rdownwardly out of engagement with the de tent 28.

The longer arm of the straining lever 18 is preferably provided with anadjustable runner 30 adapted to bear on the elongated abutment, saidrunner being preferably the head of a screw, the threaded shank 31 ofwhich is: engaged with a tapped orifice in the longer arm of the lever18. By turning said screw to adjust the head or runner, 30 outwardlyfrom the edge of the lever 18 the tension imparted to the blade by thedescribed'operation is increased.

It will be seen that the described construction issimple, strong anddurable, and enables-the blade to be quickly and tightly strained and asquickly released. The slotted handle forming the ears 21 which bear onoppositesides of the frame and its arm 15 so that the frame supports thehandle against twisting strains is an important feature of my invention,said ears also forming a housing or casing for the longer arm of thestraining lever. The elongated abutment at the inner end of the'slot inthe handle is also an important feature, said abutment adjustmentapplying pressure to the lever moving the latter to its strainingpositio'n- Having described my invention, I claim:

1. A saw comprising a rigid frame having a back, a blade-engaging outerarm, and a lever-carrying inner arm,a handle having a slot in itsforward portion, the sides of which form ears pivoted to the frame andbearing on opposite sides thereof, the inner end of said slotconstituting an elongated abutment, a lever fulcrumed on the inner framearm and having a shorter blade-engaging arm and a longer arm adapted toex tendinto said slot andbear on said abutment, the handle being adaptedto swing to and from its operative position relatively to theblade, andthe lever being moved to a blade-straining position by the abutmentwhenthe handle is moved to its operative position, and means forconfining the handle in said position.

2. A saw comprising a rigid frame having a back, ablade-engaging outerarm, and a lever-carrying inner arm, a handle having a slot in itsforward portion, the sides of which form ears pivoted to the frame andbearing on opposite sides thereof, the inner end of said slotconstituting an elongated abutment, a leverfulcrumed on the inner framearm and having a shorter blade-engaging arm and a longer arm adapted toextend into said slot and bear on said abutment, the handle beingadapted to swing to and from its operative position relatively to theblade, and the lever being moved to a blade-straining position by theabutment when the handle is moved to its operative position, a fixeddetent on the handle adjacent to the fulcrum of the lever, and a latchpivoted to the inner frame arm and adapted to engage said detent toconfine the handle in its operative position.

3. A saw comprising a rigid frame having a back, a blade-engaging outerarm, and a lever-carrying inner arm, a handle having a slot in itsforward portion, the sides of which form ears pivoted to the frame andbearing on opposite sides thereof, the inner end of said slotconstituting an elongated abutment, a lever fulcrumed on the inner framearm and having a shorter blade-engaging arm and a longer arm adapted toextend into said slot and bear on said abutment, the handle beingadapted to swing to and from its operative position relatively to theblade, and the lever being moved to a blade-straining position by theabutment when the handle is moved to its operative position, and meansfor confining the handle in said position, the longer arm of the leverbeing provided with an adjustable runner contacting with the abutmentwhereby the tension of the blade may be regulated.

1. A saw comprising a rigid frame having a back, a blade-engaging outerarm and a lever-carrying inner arm, a handle composed of a wooden bodyhaving a slot in its forward portion forming two cars, and a metalliclining in said slot, the sides of the lining bearing on opposite sidesof the frame, and a lining at the inner end of the slot constituting anelongated abutment, a pivot pin connecting said ears and the sides ofthe lining with the frame, and a lever fulcrumed on the inner frame armand having a shorter blade-engaging arm and a longer arm adapted toextend into said slot and bear on said abutment, the handle beingadapted to swing to and from its operative position relatively to theblade, and the lever being moved to a blade-straining position by theabutment when the handle is moved to its operative position, and meansfor confining the handle in said. position.

In testimony whereof I have aflixed my signature, in presence of twowitnesses.

JOSEPH WOOD.

Witnesses ARTHUR H. BnowN, P. W. Pnzznrrr.

Copies o this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, 110.

